personal income tax vs vAT declaration

I started as a self-employed in secondary occupation in July 2024 and fall under the category of small businesses with a VAT exemption. I acknowledge that I do not have to submit a vAT declaration, so I do not have to pay personal income tax either? Is this the same thing? I cannot find any information about this anywhere. That is why I am asking this question here. Because my Dexxter does state a calculation of my personal income tax, but I do not have to submit a vAT declaration. What is the difference? Hopefully someone can help me.